The Romanian princess accused of hosting a series of cockfight derbies on her eastern Oregon ranch worked the concession stand, selling beer and tacos as roosters ripped each other up in a nearby ring, according to video footage shot by two undercover informants.

A criminal complaint affidavit unsealed Monday offered the first detailed account of what prosecutors say now appears to number at least 11 cockfights in a shed owned by Princess Irina Walker and her husband, former Coos County sheriff's deputy John Wesley Walker, on their property two miles southwest of Irrigon.

Investigators serving a search warrant last week at the Walkers' triple-wide manufactured home found 24 shotguns, rifles and pistols -- including a high-end Sig Sauer P228 semiautomatic handgun. They turned up weapons in bedrooms, offices, closets and the laundry room.

Agents seized two cellular phones, $8,137 in cash, and Oregon Medical Marijuana Program documents for John Walker, a registered patient in the state program, the government alleges. Investigators found 24 cannabis plants, some of them massive, on the 2.71-acre property.

In all, federal agents arrested most of the 31 people indicted in Oregon and Washington for their roles in 33 suspected cockfight derbies in eastern Oregon and southcentral Washington between March 2012 and late last month.

The government's criminal affidavit in Oregon, signed by Special Agent John Sherman of the U.S. Department of Agriculture's Office of the Inspector General, offers a rare glimpse into the covert world of a cockfighting, a blood sport outlawed in the United States.

View full sizeJohn Walker and Irina Walker in Romania. Courtesy of MediafaxFoto

Sherman and his fellow investigators sent two informants, wearing audio and video recorders, into the den of suspected cockfighting participants. Their job was to make friends, buy blood-sport paraphernalia and attend the derbies.

The informants, both brought on board last year and paid for their work, were given cash to take part in the cockfighting, according to the affidavit. They carried money from the USDA, the Drug Enforcement Administration, the Washington State Gambling Commission and the Blue Mountain Narcotics Team.

Both of the informants had shady histories of their own. One is a convicted burglar, with drug felonies under his belt, who is trying to gain legal U.S. citizenship, according to the affidavit. The other was deported in 1983 but is a permanent legal resident of the U.S. He's looking to get a lighter sentence on charges of drug trafficking and other felonies, the government acknowledges.

By all accounts, the snitches fit right in on the ranch owned by the Walkers, whose unlikely union took the Swiss-born princess (fifth in line to the Romanian throne) and her lawman husband to the dusty farmlands of Morrow County.

The informants' undercover work identified concessionaires, a gatekeeper, a referee, a rooster handler, and a cook who prepared Mexican food for the mostly Latino crowd.

The Walkers both sold alcohol and food in the cockfighting shed, the affidavit alleges. It describes John Walker -- at least on one occasion -- as the man keeping watch on the outside.

"(An informant) observed John Walker monitoring everything around the derby and driving around, performing what the (informant) believed to be a security function," Sherman wrote.

The government accuses eight of the men nabbed in Washington of traveling 110 miles down Interstate 82 to take part in cockfights at the Walkers' ranch. Those suspects were indicted in both states during the last week on charges of conspiring to violate the animal welfare act and other crimes.

The Washington group is accused of holding at least 22 cockfight derbies during the last 16 months.